mjs513
Senior Member

@Robin. @tonton81 has a couple of other Teensy libraries of note: IFCT - Improved Flexcan Teensy Library (https://forum.pjrc.com/threads/52906-IFCT-Improved-Flexcan-Teensy-Library?highlight=canquitto ): He reworked...

I know that this is an old thread but I had a need for testing something using a Teensy in Slave Mode. So I managed to get it partly working on the T3.2, T3.5 and the T3.6. However, I ran into a problem when I want in...

Just a followup to my SPI testing using I teensy as a slave. I attached a T3.5 and had set the 1052 to transmit at 60Mhz - data came across correctly. Was a bit surprised at this - but to make it work I had to...

Changed everything to go with 8 bit frame size as a second test, this is what is happeningdata: 231 data: 232 data: 233 data: 234 data: 235 data: 236 data: 237 data: 238 data: 239 data: 240

If you want to try the T3.2 slave here is the zip: EDIT: Just tried the slave on a T3.5 and it ran - pretty much gave me the same results :)

Yes it should. Thanks MichaelM

Out of curiosity I ported the T3.0 Slave Library to run on the T3.2 and attached it the 1052 board using example master interrupt from the SDk. To get it work I did have reduce the framesize to 16, SPI clock to 20Mhz...

See the answer to this post where you originally posted the issue: https://forum.pjrc.com/threads/45173-Prop-Shield-large-drift?p=192428&viewfull=1#post192428 You also try the Kalman Filter version which tends to be...

Are u using the Freeimu sketches or the PSImu sketch? EDIT: If you are using the PSImu sketch I just noticed an error in the calibration file while debugging the example. If you look at the calibration.h file it...

For some strange reason I still can not get the lspi_interrupt example to work - just hangs. So, finally dug out my scope from storage and think I figured out how to use it again. I played around with the example file...

As a follow on to post #129, this is a better comparison between values obtained between the 1052 and a T3.5 based on a average of several readings of 10 seconds each: Volts 1052 3.5 5 21,801 21,155 ...

Since I couldn't get the basic spi_interrupt example running on the 1052 board decided to give the basic quadrature encoder/decoder example a try and compare it to what I got from a T3.5 using the encoder library. For...

I'll second that - looks really good. We have been using something called Telemetry Viewer for x-y type of plots - http://www.farrellf.com/TelemetryViewer/. May give you some other ideas as well.

Just a redesigned backpack. Just make the current backpack longer to fit the T3.5/6 and extend the headers to match the T3.5/3.6 mounting backpack. If i get some time i can probably sketch it up for you. Mike

+2, don't think anything needs to get "fixed"!

Curiosity always seems to get the better of me. The only time i ever saw that _write error was when I tried to use printf without redefining it to Serial.printf. So i found the gcc++ getopt.h/.c online and it uses...

A while ago you asked me if had any ideas for mounting a t3.6 to the backpack. One possibility is just to lengthen the backpack to fit the T3.6 and extend the headers so that you can get access to the additional pins. ...

Hi Brian. Finally had a chance to try out my IMU backpack with the double frame. As expected works out of the box. Just tried it with the advanced i2c example. Now will try one of the Kalman filters :) Would mind...

Just out of curiosity I tested the code posted by @luni. It compiles and runs but no output.

Thanks for posting this. It actually just happened to me but haven't got around to do a search yet on repairing.

Agreed. I try to look at the associated function calls, a lot of the it will shed light on the the modifications to the registers necessary to make the associated changes. That was the only reason I was pointing the...

Don't think its really a hack. Was rummaging through the lspi.h driver source and there seem to be 2 functions that you can use to adjust the delays: / * * Note that the LPSPI module must be configured for master...

I found this on the nxp forum: https://community.nxp.com/thread/477739, i.mx RT1050 LPSPI. Think it just about confirms what @manitou is saying about lspi max speed. EDIT1: Ok my first edit is way wrong. Just...

@MichaelMeissner - thanks for the detailed explanation in your post, especially the last paragraph. Really explains things for a neophyte like me :)

@manitou - sorry wrong example I am using the fatfs_sdcard example in the fatfs_examples folder. Too many examples spinning in my head

I am using the sdcard example that's in the driver examples folder. I changed the buffer size to 1024 which is defined pretty much at the top of the example for the test.

Figured out how to get a sdcard example working on the 1052 evkb. I added a timing function based on something the @manitou helped me with: Make file system......The time may be long if the card capacity is big. (I...

Thank @manitou for that one - I thought it was appropriate :)

Don't know if this will help but if we just compare -O3 optimization: coremarkish iterations/sec M7@600mhz 2438 ARM CC -O3 T3.5@168mhz 369 Fastest (O3) ...

Did a few more Coremark tests using a T3.5 for comparison to the T3.6 and the rt1052. Results are based on the GCC5.4.1 20160919 (release) : coremarkish iterations/sec M7@600mhz ...

Thank you for the link. Will take a look and give it a try. Guess curiosity is good and fun most of the time! Thanks again Mike

Is there a source where I can get a copy of coremark so I can play with it on the Teensy? Thank you.

@Frank B. Didn't want you to think I forgot about your question. Unfortunately, I have not been able to get the ext speakers working. The board uses a WM8960 98/95 dB Stereo Codec with Class D Speaker Driver chip...

I tried the sai example for recording and playback. It uses a headset mic and the board mic to record and then playback. It does work but volume was low. Have a new headset coming with a mic and as soon as I find my...

In addition to the Click (ref post #1) that I have been testing with exclusively I just tried hooking up SK Pangs Microchip MCP2517FD CAN FD Breakout Board. Also tested with SK Pang's CANFD with the Teensy3.2 board. ...

@manitou - found something on the nxp forum talking about ISR Latency while looking for something else that you might be interested in: https://community.nxp.com/thread/482121

Back the CAN testing I was doing in post #61. Once I figured out what it wanted from the Teensy side, I finally go the example working and made some modifications to print additional messages and send a whole 8 bytes...

As Frank B said - WOW. You are all amazing. Going to be a lot of work for you all just to get the needed libraries up and running to support the features of the chip. Going to be a busy year next year :) Sign me up...

Just tried two of the Flexcan examples. Loop back worked with out issue. However, during testing I somehow managed to get my board stuck so I couldn't upload any additional programs. The debugger failed to run with...

While poking around NXP I came across this document: How to Enable Boot from Octal SPI Flash and SD Card. Makes interesting reading and not sure you all have seen it. I just scanned through a few minutes ago. Just...

Just finished testing the external ram that uses the semc controller driver example. As expected the example runs. In order just to get a relative measure I wrapped the calls for 32-16-8 bit writes in a timer that...

@manitou. Doesn't appear that its really is an MBED problem - funny I was just thinking about spending time discussing it here. My apologies for that, but was just trying to ensure myself it wasn't an issue that had...

Cool on the breakout board. You know - you are going to have to eventually settle on a magnetometer.

@defragster = on the teesny 3.5 with Onehorse's breakout board I can run Brian's library with interrupts enabled at 1Mhz no issue - I get the number of hits I am expecting. For instance if I count the isr firings per...

Ok spent the day revamping how I converted the library for use with the 1050. Basically just went with a .h file and got rid of the .cpp file and all initialization is done in the convention way. I did get it work...

Hi Brian - the only thing I see in way of breakout boards is the bosch shuttle board for the BMI088?

Hi Brian. To answer your questions: Yep. This is the way I have it set up: //Set up I2C, (SDA,SCL) I2C i2c(A4, A5); //MPU9250 Imu(A4, A5); // SDA, SCL MPU9250 Imu(i2c, 0x68);

I2C with the MPU9250 still driving me a little on the crazy side but don't think its an i2c issue. Over the last day or so did a modification of the code to see how many times the interrupt fired per 1000 loop cycles...

Receiving sketch (T3.5 for me): /************************************************************ * Test sketch for receing CANFD messages using a MCP1517FD * Click board by Microchip with a Teensy using * the...

Thanks to tonton81 in helping me getting the examples working. My test setup is using a T3.2 to send different types of messages to a T3.5 for testing the receive message part of the library. It doesn't really matter...

tonton81 has allowed me to try out the library while in development as I have tendency to break things during testing. Good way to find bugs. All I can say is that the library is pretty seamless to use and stable. ...

Hmm. The difference in the version I am using is this single line when using the interrupt, I am also using d2 instead of D12: mpu9250.readByte(MPU9250_ADDRESS, INT_STATUS); //? need this with ISR I will give it...

After talking with Onehorse on his GitHub page about some strange timings I was getting and getting interrupt version to work correctly. I ported over the ESP32 version so it would run on the Teensy and then on the...

for testing the mpu-9250 am using the mbed toolchain. For the UDP tests I used the MCXpresso. However, I tried to run a udp example using the mbed compiler but couldn't get it to compile. I just finished a second...

I just ran Kris Winer's MPU-9250 sketch along with his 9250 breakout board. Based on his notes: On the imrtx1050 his sketch I got 8117.8 Hz update rate. For comparison I ran it on a Teensy 3.5 the sensor...

Couldn't edit previous post got it working (something dumb on my part) so it returns results but can't even get the gyro to be recognized. Will continue playing.

Ok. Spent the day on and off trying to port a gyro library over for the FXAS2100C to use with the AGM01 board. Unfortunately could not get it working to save my life. I probably loused up the i2c reads. But tried...

Just figured it out but you got back to me to before it could post. Something dumb on my part - had to change the address of the FXO8700Q. Was very late last night when I tried it. Yes, I know, there is the...

Hi @manitou Got the board up and running. Loaded blinky using the online compiler which I think is probably easier to use than the ide - but that's next. Next was to load up the...

Thanks manitou - only speak a little unix but at least I get the usb port language :)

Should be getting the board today. Then will start the learning curve. Any tips or gotchas I should worry about especially with i2c?

Hi Brian Went back to my FreeIMU library to see what I did for the MPU-9250 and saw that I added a butterworth filter on the magnetometer. If you want to laugh this is the note that I had for the adding the filter...

Thanks for the update on the T4. Guess that will be folks Christmas present :) Really appreciate all that you do with the Teensies. Since I got into them haven't worked with an Arduino's just the IDE. Don't...

Thanks manitou. Just remembered in the other thread they also have a 1060 and 1064 dev board. Not sure what the final chip will be for the first T4

Thanks for the added info. Didn't see the on line compiler anywhere - have to check. I saw those notes when I was looking at those pages. Just as info I ordered the board from Digikey to try some things out on it :)...

Hi Brian Thanks for the added info. I tried a couple of things that I did not mention with the 9250. The first was to implement a Temp Correction Curve (TC) on the accelerometer but that didn't have much affect. I...

@manitou - Thanks for the post was looking at picking up one these boards just to play around with but wasn't sure how to get started. I just went through the NXP getting started page and that does a nice job with...

Just a quick updated if you are interested. As you might have guessed my frustration with Kalman filters and the MPU-9250 is beginning to get the better of me. I decided to do a quick test by using a hmc5883L that I...

I just reran the above scenario with my modified lib and to my surprise didn't see the issue described above even though in a day of running tests I saw that occur multiple times using the MPU-9250 library. Wil do more...

Back again even though this thread seems kind of dormant. Any way been playing around with the different Kalman filters and MPU-9250 drivers. Using the uNAVAHRS (GitHub) I hooked up a couple of different sensor...

Hi Brian Thanks for the added pictures on the backpacks. Just wanted to double check that you still was going to create a 900 MHz / 433 MHz Backpack. Things change. As for the MCP2562FD just wanted to check...

Hi Brian Think I should clarify what I mean with the CAN transceiver. There are 2 versions of the MCP2562 for CAN 2.0 and the other for CAN-FD. The datasheet you have linked in the store for the CAN backpack refers...

Hi Brian Was just browsing your Backpack store. Can't wait to see better pictures. I do have a couple of questions though: 1. What happened to the RFM69HCW radio it looked interesting? 2. Does the GNSS module...

Hi Brian Have gone back to your updated uNAVAHRS code (no GPS) to play around with that version. I did incorporate a temperature compensation curve for the accelerometer and that seemed to help the yaw drift a bit. ...

Hi Brian - on the embedded masters 9250 breakout board I seem to remember you also had to connect vdio to vdd and FSYNC to ground is that correct? EDIT: THANKS FOR THE FAST RESPONSE :)

Oh, ok now I understand what you were talking about. I have that board as well and modified it to use SPI. Didn't know all I had to do to I2C to work again was to tie nCS to power. Glad I asked. Still have to...

Ok, but not sure what that means when I am dealing with a normal breakout board. Are you using your board or a breakout board? Just curious I am not having a problem with Wire when using Kris Winer's library.

Never mind I know what I did. Better let Mr S. know. I remember, I was too but now I seem to be having a problem. Not sure what happened. Would like to track it down though. Just very strange because it seemed to...

PLEASE IGNORE THE POST. I FOUND MY MISTAKE - HAD A SHORTCUT POINTING TO THE WRONG Version.

Hi Brian, Yep. I2C with your library. The one I converted from Kris seems to be working. I am using Arduino IDE 1.8.7 with Teensyduino 1.44-beta-2. Strange - thought I installed 1.44. Mike EDIT: Guess what...

I just got this one from Amazon: https://www.amazon.com/gp/product/B01I1J0Z7Y/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1. Don't know what happened with i2c. That's why I switched libraries and seems to working fine...

Hey Brian Was incorporating the temp correction curves for Onehorse's MPU9250 but was getting some strangeness with conversions. Was getting reverse spikes in temperature readings, in other words, it would stay...

Understood. To avoid any misconceptions or misuse will cease and desist with any further updates or posting of images.

@defragster. Yeah - went back and remembered you said and showed that before. Also, as I mentioned these images were notional based on the pins-functions posted on the original post 20 and now updated in post 184. ...

Never thought about that one. In that case not really sure how to place them - for now guess it will have to remain notional. I will modify it to show what will be on the bottom side. Matter of fact should have put...

Ok based on post #182 this is what it may look like, I like pictures, easier for me. Actual pin assignments may change, just for quick ref: If I missed something or labeled something wrong please let me know. ...

@defragster. Just wanted to let you where my confusion came from. Just took a look at the ref doc. I think changing from the 1050 to the 1060 would be beneficial whether or not CAN-FD is incorporated into this first...

@defragster. With all this discussion on what to sacrifice to get two pins for CANFD, think I lost focus on the actual pin assignments according the spreadsheet in post #20. When you talking about 4th IC I made the...

If this is an actual option (but it didn't appear that it was) it might be the better bet (substituting CANFD for SDA4). Only challenge to my soldering skills is whether its on the edge or the underside as I assumed it...